Sewing machine



April 29, 1924. 1,492,235

7 F. ASHWORTH SEWING MACHINE Original Filed Sept. 22 1915 2' Sheets-Sheet 1 April 29 1924. 1,492,235

F. ASHWORTH SEWING MACHINE Original Filed Sept. 22 1915 2 'shee'ts she'et 2 Patented Apr. 29, 1924 UNHTED STATES PATENT cities."

FRED ASHWORTI-I, 015 BEVERLY, MASSACHUSETTS, ASSIG-NOR, BY MESNE ASSIG N- MENTS, TOUNITEI) SHOE MACHINERY CORPORATION, OF IPA'IERSON, NEW JERSEY,

A CORPORATION OF NEW JERSEY.

SEWING MACHINE.

Application filed September 22, 1915, Serial No. 52,006. Renewed January 15, 1920. Serial No. 351,562.

T allcuhom it may concern:

Be it known that I, FRED Asrrwon'rn, a citizen of the United States, residin at Beverly, in the county of Essex and btate of Massachusetts, have invented certain new and useful Improvements in Sewing Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention relates to Wax thread shoe sewing machines, and more particularly to mechanism employed in connection with such machines for grooving the sole of a boot or shoe.

In the type of machine in which the present invention is embodied the presser foot is maintained in engagement with the work during the formation of a stitch and is entirely removed from engagement with the work during the feeding movement.

An object of the present invention is to provide certain new and useful improvements in a machine of this type which will adapt the machine for forming a groove in the outsole during the outsole stitching operation. With this object in view a feature of the invention consists in the combination ported thereby, of mechanism for actuating the presser foot under the control of the operator to cause the removal of the presser foot from the work during the feeding movement, or to retain the presser foot in yielding engagement with the Work during the feeding movement. According to this feature of the invention the machine may be operated in the usual manner to clamp the work during theformation of a stitch and to entirely remove the presser foot from the work during the feed ing movement when no groove is to be formed in the out-sole, or the presser footmechanism may operate to relieve the positive pressure of the foot upon the work without entirely removing the presser foot from the work when forming a groove in the outsole.

In the accompanying drawings illustrating the preferred form of the invention; Figure 1 represents a side elevation of a with a presser foot and grooving knife sup' sewing machine embodying the invention; Figs. 2 and 3 are details representing the presser foot actuating mechanism in position respectively to maintain the presser foot in engagement with the work during the feeding movement and to entirely remove'the presser foot from the Work during the feeding movement; Figs. 4 and 5 are details showing side elevations of the mechanism illustrated in Figs. 2 and 3; Fig. 6 is a view showing a cross section upon the line 66 of Fig. 4; F ig..7 is a detail showing a cross section uponthe line 77" of Fig. 2; and Fig. 8 is a detail illustrating the method of supporting the grooving knife upon the presser foot. y

The machine shown in the illustrated embodiment of the invention is substantially the same as that disclosed in the application of Ashworth, Ser. No. 769,566, filed May 24:, 1913, Patent No. 1,233,539, July 17, 1917. This machine comprises a work support 1. and a cooperating presser foot 2 which is mounted upon one endof a presser foot lever 4t fulcrumed at 5. The presser foot actuated during the operation of the ma chine to first engage yieldingly with the work, is then positively moved a predetermined distance to: clamp the work during the formation of a stitch, and is finally elevated and retained in this position during the feeding movement of the work, after which. the cycle of operations is repeated. In order to accomplish this movement of the presser foot the lower end of the presser foot lever is connected through a link 7 with an actuating lever 8 pivoted between its ends to a controlling bar Q'ivhich is locked at prec'letermined intervals in a head 10 through a; locking device indicated gen erally at 1.1. The lower end of the actual ing lever 8 is connected through a link. '12 with a tension spring lii which normally tends to swing the presser foot lever in a direction to move the presser foot into engagement with the work. i The upper end of the actuating lever 8' is connected to? the usual operating lever 15 through a link 16 to cause the operation of the actuating lever from a rotarycam disk (17. At the completion ofthe feeding movement of the work the controllingbar 9 is free to move and the spring 13 accordingly swings the actuating lever 8 about-the connection with the link 16 towmove; the: presser; toot :into yielding engagement With-the work. .."I.l1e control ling bar is then locked in positioniand. the cam diskl'?operatesthroughthe lever to swing the actuating lever about. the .conmotion with the bar 9 to move the presser foot a predetermined distance and positive- 10 ly clamp the work. The lock lleis conplever 20., and .is' innlockedithrou-gh an arm 26:.-ope1fatively connectedwwitha a; rotary acam. It iszzdesirable lthat ,thisimachinezbe. adapted 2o :siori' foi'ining. a. groove; in the routsole 1 whenoperationcf; the: presser; foot. In therapies- "iQIllifillIYBl'ltlQIIitllB g1COOV1]1g-kn1f is :conven 1 iently secured upon: theypresser footand ;in'

zsriorderatoeause the'formation-wot' a: groove *the :presser foot actuating mechanism .is arranged to:main.tain the, presser afoot llbylGld- Ling engagement-with the i \work :during the feeding movement. This is conveniently, ac-

30 complished by -.providing: a-lost mot-ion con- :.nection :.:-under .the econtrol: of .the operator 'cbetweenpthe pressem ifoot lever Y and the acptuatingvmechanism arranged to :permit the usual: operation of. the: actuating mechanism without lifting;therpresser r foot fromthe -work. Touthis end, as shown clearly in vFiigsufito 7, inclusive:a5studs80 issecured in the FlOWGlaiGIlld of the-presser "foot lever A: and is rlooselynreceived in; a slot 31 formed -in the; link 7. --lhe zextent of: movement of -the-stud30-relative to the link 7 is deter- :mi-ned' by; an adjusting :member .82 ournaled in the link ,at 1 right. angles to the. stud i30 andrhaving a peripheral groove -33-of var :ing depth formed: thereinazopposite the stud 80. With :;this construction, by adjusting the position of the member 32=the clearance between .;the face of themnemberandfihe stud 30 ,rnaybe variedras desired to-vary "the.extentao fsmovement'of the stud-30relativezto the link-Zesshownclearly in Figs. :-6:..-and. 7 'ITheadj Listing member is: provided -with 1a eslottedihead .335 ithe periphery 'of whicheismnt away; to provide oppositely distact 'witli a -stu'd 38 zsecured in the link 'i' to determine" therlimitg-of movement o'f'the ad;insting rmernber in epposite' directions.

' With :the;adjustingnmember positioned as eocsshownuiniEigs. 2, trend-6, adimited move- .cment ofzbha-presse'riiioot lever-with yrsspect to; thei :7 may :besecured, whereas with that-adj usting Emenrher in: therposition shown in Elgsii :and:-5, (the linki is gconneeted v die5x'rectlyztmtheepresser. foetvlever withzznorprovision for a lost motion of the lever relative to the link. When it is desired to cause theoperation of the presser foot in the usualnnanner thead ustmg member is POSP tioned as shown in Figs. 3 and 5 and the presser foot is accordingly elevated clear of the work during the feeding movement, but

when. it .is desired togroove the. outsole the adjusting member is positioned as shown inFigs. 2, 4 and 6 and upon moving the link through the actuating lever 15 to raise :the: presser foot the 510st iHlOtlOl'l between the stud and link permits the presser foot to remain in contact with the work. During this .movement. theengagement of the .pressertoot with the work isseeured by a spring 40- whichconnects the stud 30 with the controlling bar '9, as shown clearly in :Fig. 1. In the illustrated embodiment of :the invention, the grooving tool is indicated .irever idesired vwithout effecting the normal 2 Elt-ll' and i-ssecured to the presser. foot with the; operating "face of the tool projecting below the: face of the presserfoot by a headed fastening indicated at 42.

:thile: it isjpreferred to employ the spe cific construction; and arrangement of parts shown-.- and 1 described, it: will be. understood that. thiseconstruction and arrangementis not essential GXOBPtnSOQftHKEIS SPQClfiECl in the claims, andmaycbetchanged or.modified without idepartingvr-from the broader features of-the invention.

The .invention having been described, what isclaimed is:

1. A-sewingzniachine comprising a presser foot, aggrooving; knife: supported upon the presser foot, iactuating 1 mechanism for .re-

moving the; presser foot ifl'OlH the workduring the feeding :op.eration,-.- and Y means i for adjusting the actuating mechanism to maintain the presser foot in yielding aengage- .mentwith the work :during theteeding operation.

2. -A sewing machine. comprising apresser and link having provision .for' a .movement 'of. the. lever relative to the link, and means for:varyingthehamount of relative movement of the lever: and link.

Assewing machine comprising apresser :ttoot, ,azrgrooving knifesupported thereon, a ipnsed shoulders? 36vandr87 arranged-- to ron- {Stud is loosely 'l8C6lT 'Bd, ?ll1Cl a rotatahleadgusting membersupported in the link and arranged to 'vary' the extentof movement of the-stud relativeito theilink.

4. A sewing machine comprising apresser "foot: lever; actuating mechanism for the lever includinga link, connections between the lever andlinlrhaving provision 'for arelative movementof the lever and link, a rotatable adjusting member for determining the extent of the relative movement, and means for limiting the movement of the adjusting member in opposite directions.

5. .A sewing machine comprising a presser foot lever, actuating mechanism for the lever including a slotted link, a stud secured in the lever and received loosely in the slot, a rotatable adjusting member journaled in thelink and having a peripheral groove of varying depth formed therein in operative relation to the stud, and means for determining the position of the adjusting member.

6. A sewing machine comprising a presser foot, means for yieldingly pressing said foot against the work, mechanism for lifting the presser foot from the work during each cycle of operations of the machine and for depressing the presser foot a predetermined distance from the position it assumes under the action of said yielding means, and means for rendering said mechanism inoperative to lift the presser foot.

7. A sewing machine comprising a presser foot, a spring for yieldingly pressing said foot against the work, mechanism for raising the presser foot from the Work during each work feeding interval of the cycle of operations of the machine, means for rendering said mechanism inoperative to raise the presser foot, and a second spring for holding the presser foot against the work during the work feeding interval when said mechanism is inoperative.

8. A sewing machine comprising a. presser foot, means for yieldingly pressing said foot against the work, means for looking the presser foot against the work, mechanism for raising the presser foot from the work during each work feeding interval of the cycle of operations of the machine, and means for rendering said mechanism inoperative to raise the presser foot.

FRED ASHWORTH. 

